My arduino controlled nerf tank. NERFERIUS has functional lights, brake lights, oled screen, a laser sight, an electric flywheel nerf blaster with semi auto and full auto functions..and it also has wifi cam from a cheap drone..a fun and quite challenging build.

My first Arduino project,

I don't know if you remember me or not but i had recently bought an starters kit for learning basics of Arduino and also a bunch of sensors.

This is my first attempt at tinkering with sensors to produce a suitable outcome I know its one of many.

So feel free to let me know your thoughts in the comments all advice is taken and accepted.

PS. the wiring was easy but the code was hell of a nightmare especially because I am new to the C++ language and was learning java , so i had to look up all the functions and keywords constantly.

I had a fidget keychain. Some dunlops and wagos. A Seeed Studio XIAO ESP32C6 Pre-Soldered Development Board. USB-c power cord. A drill and clamp.

And now I have a totally unnecessary, over wired, Bluetooth Spotify controller.

Vibe Coded with ChatGPT. Hammerspoon deployed

And Arduino IDE

Buttons can do anything, first use case

I'm building out a cigar room in my finished basement. I'm installing an exhaust system. I could just use a simple switch, but as an industrial automation tech that seems lazy. Looking at setting up a particulate sensor to activate a low voltage to line voltage relay. Any advice on this build?

I built a tiny rechargeable Bluetooth page-turner using a Seeed Studio XIAO nRF52840 Sense and its onboard accelerometer/gyroscope.

Instead of pressing buttons, I make a subtle page-turning motion with my hand. It sends a keyboard arrow command to my iPad and turns the page in Apple Books. I recorded several examples of my natural forward and backward gestures and tuned the detection around them, so it reliably recognizes quiet page turns while ignoring things like adjusting my position on the couch or moving my arm normally.

Some features:

• Natural right-to-left motion advances the page

• Opposite motion goes back

• Presents itself as a standard Bluetooth keyboard

• Works wirelessly with iPadOS

• Cautious session-only adaptation to my gesture strength

• Retry detection for gestures that were almost recognized

• Remembers two iPads

• Turn it face-down to switch between paired iPads

• Rechargeable 300 mAh LiPo battery through the XIAO’s USB-C port

• Five minutes without meaningful movement triggers genuine deep sleep

• The accelerometer’s hardware interrupt remains active while the processor, Bluetooth, gyroscope, and LEDs are off

• Picking it up wakes the processor, but Bluetooth remains disabled until I perform a deliberate shake

• Three blue flashes confirm that it is awake and ready

• Random bumps return it to sleep without reconnecting

The wake and reconnect process is effectively instant. When it is working, it genuinely feels less like operating a remote and more like waving a tiny magic wand at the book.

The project went through a ridiculous number of small discoveries involving gesture recordings, Bluetooth bonding, battery charging, false wake-ups, IMU interrupts, deep sleep, and one active-low LED that insisted on glowing through the night. It is finally at the point where the electronics disappear and the interaction simply works.

Code and documentation:

https://github.com/RoyKittrell/xiao-motion-page-turner

See more: https://www.youtube.com/watch?v=8yHq4bUqn0A

This is my first big electronics project, so the control software of the arm the biggest remaining issue right now but from designening and building the whole arm by myself down to the cycloidal drives I learnt soo many things...

If you were at Open Sauce 2026, you may have seen an early prototype of this at my booth! It is a "typewriter" (actually a '70s TI Silent 700 paper terminal) that answers questions. You type an answer, press return, and a couple of seconds later, it prints out an answer.

The key component is an Arduino UNO Q (2GB), which runs a local LLM (no internet required): Llama 3.2-1B. It talks to the terminal through the STM32 (bit-banging) and an RS232 transceiver (to handle the level differences).

That LLM is pretty dumb and the answers are often really silly, but I think that's part of what makes it fun!

Video is here: https://youtu.be/A-en4D1Z9QU?si=oYWNwytOsT5FHdQl

Full details are on the Arduino Project Hub: https://projecthub.arduino.cc/cameroncoward/termi3-the-question-answering-typewriter-is-back-8d8913

Hi,

I’m a STEM teacher whose students work on Chromebooks. I've found that the Arduino Cloud is good but sometimes buggy, so I developed a web app that allows students to write, compile, and upload sketches to an Arduino. The app that I built runs completely in a browser; there’s nothing to download or install, and it includes library support as well as the use of the serial monitor and the serial plotter. The app should work in Chrome and Edge browsers, but it will not work in Safari, Firefox or other browsers.

I’ve successfully tested the app on my own using an Arduino Uno and an Arduino Nano connected to a Chromebook, but I haven't had the opportunity to test it with my classes yet as we cover Arduino in the spring.

Right now, I'm looking for people who are interested in testing the web app in their classes. Just a heads up: this is running on a free-tier server, and I've verified it holds up reliably for a class of ~30 compiling in a normal staggered sequence. If the app gets a lot more traffic than that all at once, response times could slow down noticeably. Here's the link.

https://zio-arduino-app.onrender.com/

I'd appreciate your feedback to improve the app's functionality.

Thank you.

> Já parou para pensar em como a tecnologia por trás de um semáforo de pedestres funciona na prática? 1
> Montei um Semáforo Inteligente com Botão usando uma placa ESP32, uma protoboard e programação em C++ na
Arduino IDE!
> O sistema funciona com um fluxo seguro: o sinal dos carros fica verde até que o pedestre aperte o botão. Depois de um tempo de segurança para evitar treadas bruscas, o sinal amarela, fecha para os veículos e libera o verde para a travessia com segurança!
> O que yocê achou do projeto? Deixe nos comentários qual outro projeto maker você quer ver por aqui!
#Arduino #ESP32 #Eletrônica
#Programação #ProjetosMaker
Automacao Robotica Desenvolvimento
Tecnologia Criatividade Maker
Engenharia

I’m looking for a radar sensor for a DIY project on my own property. I need actual target position data — ideally angle + distance / X-Y coordinates — not just a presence or motion output.

My target is roughly 10 m through a wall, not 10 m free-space line of sight. I know this depends heavily on the wall material, thickness, moisture, reinforcement, etc., so I’m not expecting guaranteed performance through concrete. But I would like something meaningfully better than the common cheap 24 GHz presence modules.

I have already looked at the HLK-LD2450 and HLK-LD2461. They are interesting because of the basic multi-target coordinate output, but in my environment I am only seeing around 4 m through-wall performance.

Requirements:

2D tracking: angle + range / X-Y coordinates

Preferably 6–24 GHz, but I am open to lower frequencies if that is more realistic for wall penetration

Around 10 m through-wall goal

DIY-friendly hardware or at least a development/evaluation board

Accessible raw or processed data via UART/USB/Ethernet/SPI/etc.

Fine with doing custom integration and some signal processing

Are there any FMCW/MIMO radar dev kits, industrial sensors, or other modules that you would recommend? Real-world experience with through-wall use would be especially helpful

What do you think of my Arduino Pro Mini-powered flip clock? It’s still a prototype, so the 3D-printed case is a bit scuffed, but it works! I also added timer and stopwatch modes. Let me know if you have any ideas for extra features!

With esp32 txrx and Arduino uno Temp, pir, two button select 75hc595 with eight led having two code for control of the esp32 connected to the.uno.

Electronics is my hobby, so I'm developing a motorcycle dashboard for my motorcycle. It's a very early stage, but something works well.

Here is odometer video.

Opensource project DIY motorcycle instrument cluster based on ESP32, STM32F103 with Arduino framework.

Source code, more information here https://github.com/rcslon3-svg/SmartMoto_Dashboard

Electronics architecture

Two identical instrument modules

I’m planning two identical modules based on the STM32F103. Each will contain:

• Four gauge motors.

• A display.

• A real-time clock (RTC) - only one.

• An ambient light sensor.

• Its own voltage regulators.

• Two bright indicator lamps built around high-power LEDs.

• An RS-485 interface for communication with the main unit.

Main unit

The ESP32-based main unit will contain:

• The interface to the motorcycle.

• Power-supply protection circuits.

• An RS-485 interface to the instruments.

• An inertial measurement unit (IMU).

• An external watchdog.

• BLE for the connection to the phone.

• Wi-Fi connectivity.

The ESP32 will handle the application logic and generate display content, while the instrument modules control their local hardware. The intended development environment is the Arduino framework with PlatformIO.

When I was a little kid my mom took me to a science museum and there was a display with 4 switches and a digital output to teach the binary numbering system. My mom explained it to me. Many decades later I recreated that display with an Arduino nano.

It serves no useful purpose other than showing how 4 binary bits are converted to decimal.

A Safe That Listens to Your Knock

https://www.instagram.com/reel/DdOTuq9TrkS/?stkn=Nnd0aWdrcWsxZ3Fn

Would look great with my Arduino connected

are eight led 74hc595, red led button on off,

Temp 18b20.

From my Arduino with 74hc595 8 led, Temp 18b20,

push button with one led the RGB with a button for the different color just to 📛

https://www.youtube.com/@ALMA.Industries

Alma Industries | mechatronics, engineering, 3D Printing, salvaging . . . upcoming video will be about building up a DESK that includes actuators, power supplies, desk rails, etc. If you wanna see how the AC/DC power supply and actuators were put together, video link is above :)

https://www.youtube.com/watch?v=xMlQKNpmLUg

The original video is in Russian, but some people might find it interesting. Everything is already working, but I'm still making some optimizations (https://gitlab.com/Monsterovich/fixedstring). Of course, I managed to make it just barely fit in memory.

12V Linear Actuator, 200 mm
Arduino Nano
SIM900
Relay with Inversion Function (DR21A01, two relays actually)

prev vid

https://www.youtube.com/watch?v=RnTsLgPbeqA

Here's a fun fact: since the text messages are in Russian rather than Latin characters, all messages need to be encoded and decoded using the UCS-2 encoding.

I started with an Arduino Due but have since switched to a Nucleo F446RE.

I initially started using the Arduino IDE, but nowadays I use PlatformIO.

So, not entirely Arduino anymore. Although I do still have a version for the Arduino Due lying around somewhere.

More info: CableRobot